Long distance pipeline fixed ball valve

Product overview of fixed ball valves for long-distance pipelines
Pipeline ball valves are suitable for cutting off or connecting the medium on pipelines under various working conditions such as petroleum, chemical industry, and thermal power stations with an operating temperature of ~°C. The applicable media are oil, purified natural gas, sour natural gas, coal gas, water and coal slurry, etc. The operating modes include manual, turbine transmission, pneumatic, electric, and gas-hydraulic linkage.
Product Structural Features
. When the stagnant medium in the valve cavity increases abnormally due to temperature changes, the medium pressure pushes the valve seat away from the ball to achieve the effect of automatic pressure relief. After the pressure is relieved, the valve seat automatically resets.
.When a fire occurs or the valve seat sealing ring is burned or softened due to abnormal temperature rise, the valve operation is still reliable. At the same time, the valve seat and the ball form metal-to-metal contact to achieve a temporary sealing effect and prevent the fire. further expanded to comply with the regulations.
. Unscrewing the drainage device can check whether the valve seat is leaking, and can also discharge the residue in the middle cavity to reduce the contamination of the valve by the medium. In working condition, when the valve is fully open or fully closed, the valve stem stuffing box can be replaced.
In addition to the general sealing of the valve seat, the specially designed auxiliary sealing structure can play an emergency rescue role when leakage occurs due to damage to the sealing ring.
.The valve stem is sealed with packing and shaped rings, which is especially suitable for gas media. The moving parts of the valve stem use high-quality self-lubricating bearings to make the friction system smaller and reduce operating torque.